Drilling tool

Details Drilling tool Drilling tool

1989-07-12

1991-03-26

Neuder, William P.

Boring or penetrating the earth

Below-ground impact members

175323, 175415, 166173, 151042, 408 67, E21B 406, E21B 1044, E21B 3700

Patent

active

050021397

ABSTRACT:
A drilling tool which is suitable especially for clearing drill dust from a drillhole in rock-drilling work is provided. For this purpose, the spiral shank has brush elements (6, 17) which are arranged in the groove bottom of a conventional drilling tool or which themselves form spiral feed coils.

REFERENCES:
patent: 1572769 (1926-02-01), Clark
patent: 1806073 (1931-05-01), MacGregor et al.
patent: 3310113 (1967-03-01), Maness
patent: 3351136 (1967-11-01), Nelson
patent: 3372763 (1968-03-01), Fischer
patent: 3703214 (1972-11-01), Boehm et al.
patent: 3718067 (1973-02-01), Fischer
patent: 4562608 (1986-01-01), Weir

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